Straightening-machine.



'E1 A. LANE. STRAIQHTENING MACHINE. APPLIUATION 1111211111513, 1909.

Patented July 2o, 1909.

WITNESSES mon/vers Cri ERNEST ANDREW LANE., Gln FULDA, CALIFORNIA.

STRAGHTENING-MACHINE.

l Specification of Letters Patent. Application filed .anuary 13, i909.

Patented July 20, 1909.

Serial No. 472,060.

lle it known that li, lhnvns'r liANn, a citizen oi the TUnited Staiem'and a residenty ot' Fulda, in the county oit Placer and State et California, have invented a new and Improved Straighrening-hlachine, of whichthe 'lollmving is a `tull, clear, and exact description.

This invention relates to straightening machines for removing bulges, dishes, dents and the like trom metal, and especially from hand saws, and relates more particularly to a machine of this class having removable rolls, one et which has an annular concave part spaced inwardly 'from the edges of the roll` whereby the latter has [iat parts at each side ot the concave part, and a second roll having a. convex part adapted to lit into .said concave part, the second roll having at cach side ot the eonvexed part, flat portions.

VThe. object ot the invention is to provide a simple, ell'ieient and durable straightening machine for removing dishes, bulgcs, dents and other irregularities from sheet metal, and particularly from band or other saws, which docs not a ti'ect the tension of the metal upon which it operates, and which does niet draw the metal nor Hatten' the swagc of the teeth when the saws are being straightened close to the edges, and in which the rolls are removable so thatthey can be applied to machines tor this purpose and et' diii'erent types. y

The invention consists in the constretion and combii'iation of parts to be more fully described hereinafter' and particularly set forth iu the claims.

ict'erencc is to he had to the accompanying d awings Vforming a part of this specitication, in which similar charm-.ters of reference indicate corresponding parts .in all the views, and in whit-lr v Figure l is a front elevation showing an cn'ibodiment et my invention; Fig. 2 is an enlarged elevation showing a portion of the convex roll, and the concave roll, the latter being partly in sect-ion and being shown mounted adjustablv'npon a shaft; and Fig. 8 1s a. perspective view of the concave roll.

Before proeeedmojto a more detailed explanation of my linvention, it should be' clearly undcrstoodtnat in certain industries and `tor various putposes, it is necessary to straighten sheet metal and the like by removing therefrom,idents,v bulges, dishes and other irregularities which have been caused y accidentally, or by the exigencies .of certain mechanical operations. l" r example, in sawing lumber with band saws, the saws are held movably inplace by means et guides, which are spaced inwardly from the edges et the saw a distance of approximatelyone and one-halt' inches, and as it often happens that a beard is set out before the log clears the saw, the latter is bent or dished over the edges of the guides. Again, the log-holding dogs often break or pull out and thereby permit the log to turn on the saw and thus dish the same. In these and various other ways, the saws are dished, with the result that their operation is seriously interfered with. Hitherto, saws have usually been straightened with a hannner, for as far as was known there was no machine that would straighten them without stretching the steel. l'iy means of my concave rolls a saw can be straightened in one-quarter of the time necessary to perform this operation with a hainmer. The concave rolls will not stretch the steel, and I have found that saws when straightened thereby, instead of by inea-ns of a hammer, will usually last longer.

My invention resides primarily in the provision of rolls which are movably mounted upon the shafts of the machine and which are formed to remove the irregularities from sheet metal when the same .is passed therebetween. My rolls can be applied to different types of machines and can be used for example, in connection with saw stretching machines. I wish to emphasize that the purpose of my machine is not to stretch the saw but to remove the irregularities therefrom.

I am aware that concave and convex rolls have hitherto been employed in saw stretching machines, but I provide rolls which have respectively, concave and .convex port-ions, and at each side of these portions flat parts which present no curvature in the (llirection of the longitudinal axes of the rolls." These flat surfaces receive the surface of the saw er other metal, so that the edges of the concave and convex parts of the rolls cannot injure the metal by impressing grooves or lines therein; such grooves or lines would tend materially to stretch or weaken the saw. The curved rolls hitherto employed in saw stretching machines were usually of considerable width and the curvature, either convex or concave, extends :trom edge to edge of the @Wing to he width of The shaft if.) has arranged thereon a roll the rolls ne caw blade is easily preesed tothe 552, which, like 'the roll QG, is slidable longi- 60 bottom of the curved roll. Consequently, ir' ndinally of he Shaft though consirained to the rolls are not lere toejethor rightly volare heiewih. Keepers 38 erve to hold 5 enough to 'eh the sieel, che saw binde [be roll 52 in any one of plurality oi" posi- 'will Spring beek into tbc saine @bape which lions, and the roll 3Q hase eenfral convex it had Dolore r -erehy il; is f naeicaily in1 f part and a cach veide thereof a flat part 65 possible ro s'raighen the saw wih a roller 235. The keepers 5S engage roll extensions of iihe typedeseribecl above, without Slreiclb 5 or ende 25?? as in 'the ease of lhe lower concave ing the eeel. roll.

I prefer to he *e the conearily oi" the one lfy means of 'he adjusting Screw 17 the roll qnie Sh lion', as clearly Shown in 'frame 1-1- can be raised or lowered through Fig. 2, so l .1U lhe convex part of the other the agency of rhe link il'. ln this Yay the roller projxs a distano exceso of the rolls ce. n be brought logether or separal'ed in deph of he coi ity. not. nece; L :wrrn'danee with theme01` Siliies of the operafor the liet nari@ of bolli r s te eiifage lhe lion or' machine. lVl'ien lhe metal is blade. The l Se fiat preswd eeiween the relis7 any bnlges or 75 pasis 'io I C1 of the den or the like are forced by the convex rolls from V pa of he Upper roll. into the concave part Referring in( 'l lower roll, and are 4dias straightened ings, 10 'lhe .fiek paris 31 and 3 of the respec ing or event the edg e of the convex 8O ,ai e parte from injuring the saine.

Having rbi I deScrbed my invention, l.

j 1 new, and desire lo secure by Lelcrs in a niaebine of the class described, a 'ne an annular concave part and a said parl: and extending io an of d roll,y an annular flat fr lg, ard second roll having' an annular convex; and ao each Sidx oi' Said annular 90 fffonfwev; an annular ila pari filending Said second roll, Said 'nari projecting a distance exceeding said concave pari machine oil the ch` des( ibed, a ng a hepvay longitm'lnally thereof, `ombie roll Slidaliile upon said shaft key engaging wilhin Said keyhaing Spaced inwardly from 30 acjusable screw 'i i raised or lowered7 :for a ont L appear .nere clearly liiereinalff l lies bearing jv? :in which second l navi SrL 35 gear rf? M 20, in mesh Wlice 13,

The

1 fhe innen aging" wiibin i i shell, said lae'lA l mi inwardly *ron'i 105 :onve annular exeni projecting a distance eph of said, concave groove an adj whereof l have sinned my maclzii spec' i' alien in lhe preence of mor; b Vce al a two subscribing nirnesaes.

ly ii A Span-fd invfarr from e an anne' r11 3 i' :i

able ci. l side of the part Il() is lcaraleA a u, ii. 1" zib part 3l.

illh CS? ANDREW LANE.

I .erriN lilasiuNn .'r Lim-'e'.

E Wi I i 

